CT angio head

(A-E) Computed tomography: A) baseline axial CT slice showing sulcal effacement and cortical contrast uptake in the left hemisphere; B-D) CBV, CBF, and TTP maps, respectively, showing no alterations in brain perfusion, and E) coronal CT angiography slice confirming occlusion of the internal carotid artery after bifurcation, with excellent intracranial compensation. F-H) Magnetic resonance imaging: F) axial FLAIR slice; G-H) axial DWI and ADC sequences, respectively. Signal alteration is observed on the FLAIR and DWI sequences at left parietal and frontal cortex level, with no restriction on the ADC map, which is compatible with vasogenic oedema.

Frontal projections of brain angiography with contrast injection into the left common carotid artery, confirming occlusion of the proximal internal carotid artery (beyond carotid bifurcation) (A) and distal internal carotid artery (proximal to the ophthalmic artery) (B). C) Contrast injection into the right common carotid artery, revealing correct compensation of brain circulation through the anterior communicating artery.